AITA for refusing to give my room to my stepmom’s twins even though they love the theme?

I (16F) live with my dad (45M). My mom passed away from cancer 2 years ago, and ever since, my bedroom has been the only space that still feels truly hers. It’s not just a room with four walls — it’s like a memory capsule.

Before she got really sick, she decorated it herself. She painted the walls a soft lavender, strung fairy lights above my desk, and even hand-painted little fairy silhouettes dancing along the edge of my closet door. It’s whimsical, maybe a little childish for someone my age, but for me it’s priceless. Every time I see those fairies, it feels like she’s still here with me, leaving me reminders of her love.

Last year my dad remarried. His new wife, “Claire” (39F), has 9-year-old twin daughters. The twins are fine — energetic, playful, into sparkles and princesses — nothing against them personally. But blending families hasn’t been easy. Claire has been pushing hard for us to become one big happy family, which might sound nice in theory, but in practice it usually means me sacrificing something to make her daughters comfortable.

Our house has four bedrooms:

• My dad and Claire’s master bedroom.
• My room (the lavender fairy room my mom made for me).
• Two other perfectly good bedrooms that are slightly smaller but still spacious, bright, and functional.

Here’s the issue: The twins are currently sharing a room, and they are absolutely obsessed with fairies. As soon as Claire saw my room, she decided it would be “perfect” for them. She wants the twins to move into my room together, while I’d be expected to move into one of the other bedrooms. Her reasoning? My room is the largest, closest to her and my dad’s room, and already matches their fairy obsession.

I told her flat out no. My room isn’t just a space — it’s a memory of my mom. I even offered a compromise: I’d help decorate one of the other rooms into a full-on magical fairy kingdom for the twins, complete with new decals, lights, and whatever they wanted. But I’m not giving up the one thing I have left that feels like my mom.

Claire didn’t take it well. She accused me of being selfish and actually said:

• “Your mom wouldn’t want you to hoard the fairies all to yourself.”
• “You’re too old for that theme anyway.”
• “The twins are children — it’s cruel not to let them have the magical room they love.”

This is classic emotional manipulation using the deceased as a weapon. Claire invokes your mom to guilt you, framing your grief attachment as selfishness. This undermines your mourning process and erodes your autonomy.

That stung. She was using my mom — who isn’t here to defend me — as a guilt weapon. That kind of emotional manipulation feels so wrong.

To make things worse, Claire told the twins that they “might” get my room, so now they’re begging me too. It’s hard to stand my ground when I have two little girls asking me why I won’t share “the pretty fairy room.” It makes me feel like the villain, even though I know I’m not.

My dad? He’s being neutral, which feels like betrayal in its own way. He keeps saying, “I don’t want to take sides, but maybe just think about it?” He doesn’t step in and shut down Claire’s insistence, which leaves me to defend myself — a 16-year-old against an adult and two 9-year-olds.

This is conflict avoidance. Instead of setting clear boundaries as a parent, Dad is trying to push the responsibility onto you, the child. In blended families, the biological parent has a duty to protect the child’s emotional safety — neutrality here isn’t neutral, it’s passive enabling of Claire’s pressure.

I feel trapped. If I give in, I lose the last piece of my mom that’s still alive in this house. If I stand firm, I’m the “selfish teenager” who doesn’t care about her little stepsisters.

So… AITA for refusing to give up my room to my stepmom’s twins, even though they’d love it?